198results about How to "Improve cavitation effect" patented technology

A centrifugal pump adapted to excite a high-intensity sound wave in a fluid feedstock is disclosed. The impeller and stator of the pump are provided with multiple apertures sized and spaced to produce a sound wave of an intensity greater than one megawatt per square meter in the fluid. The sound wave forms cavitation bubbles in the fluid, and the static pressure in the pump combines with the compression cycle of the sound wave to collapse the bubbles at a rate sufficient to cause exothermic reactions in the fluid. The sonic reactor can be configured for use to produce thermal energy, oil refining, catalyst production, water desalination and other uses.

The invention relates to an online broadband ultrasonic wave sewage treatment unit, belonging to the technical field of sewage treatment equipment and aiming at providing an improved ultrasonic wave sewage treatment unit with better effect; the technical proposal includes that: the sewage treatment unit is composed of a reactor, a sedimentation tank and a frequency converter tube, wherein the frequency converter tube is mounted in the reactor, an interfering plate is mounted between the outer circumference of the middle part of the frequency converter tube and the inner wall of the reactor, diffraction circular holes are evenly distributed on the interfering plate, the lower end of the frequency converter tube is mounted with a pressure jet nozzle, the pressure jet nozzle is connected with an ejector and a high pressure water pump, the bottom part of the reactor is provided with a planar reflection plate, a high frequency energy transducer and a low frequency energy transducer are mounted on the planar reflection plate, the sedimentation tank is mounted around the circumference of the reactor, the lower part and middle part of the reactor are respectively provided with a return port and an overflow port communicated with the sedimentation tank, and a water outlet is arranged on the upper part of the sedimentation tank. The online broadband ultrasonic wave sewage treatment unit has the advantages of wide ultrasonic wave bandwidth, increased amplitude, further improving cavitation effect, full reaction of atomized sewage and ozone and air, wide application range, high efficiency and economy and practicality.

The invention relates to an ultrasonic debridement surgical system which comprises a main machine, a debridement handle and a backpedaling brake. The surgical system is characterized in that the main machine comprises an ultrasonic signal control system and a fluid concentration / rate control system, wherein the ultrasonic signal control system comprises an ultrasonic signal generator and a frequency measuring and controlling device; the fluid concentration / rate control system comprises a fluid concentration generator and a rate / concentration measuring and controlling device; and the debridement handle comprises a transducer, an amplitude transformer and an ultrasonic debridement tool bar. By controlling the concentration and the rate of flushing fluid and the size of ultrasonic energy, the system can effectively perform debridement according to patient's condition, and is convenient for different trauma operations.

The invention relates to a combined hydraulic power cavitation device comprising a submerged body, a pore plate and a reed, wherein the submerged body is installed in a round pipeline to generate wake flow cavitation; the pore plate generates jet flow hydraulic power cavitation; the reed generates vibration cavitation; the submerged body is positioned on the upper stream in the round pipeline and is positioned at the center in the round pipeline; the submerged body is fixedly connected with the round pipeline by a submerged body fixing bracket; the pore plate and the round pipeline are fixedly connected and are installed between the submerged body and the reed; the porous plate is provided with a plurality of jet flow inlet holes; the reed is fixedly connected with the round pipeline by a feed fixing bracket and a reed fixing base; the reed fixing base is provided with an axial slit; the reed with a tip is embedded and fixed in the slit; and the tip of the reed just faces the center position of the jet flow inlet hole, and a gap is left. The combined hydraulic power cavitation device has the beneficial effect that a tail flow cavitation structure, a jet flow hydraulic power cavitation structure and a vibration cavitation structure are organically combined and unified to strengthen the cavitation effect. The combined hydraulic power cavitation device has the advantages of simple structure, good cavitation effect and strong practicability.

The invention provides an underwater cavitating jet cleaning system. The system is provided with a cleaning fluid autoweighing feeder, and a cavitating jet technology is organically combined with theimprovement on cleaning fluid so that jet bubbles can be increased, and hull dirty can be easily removed. A spiral channel is formed in the eddy section of a jet nozzle, and the eddy section is gradually decreased in the direction from a water inlet to a water outlet, so that the fluid velocity is further increased; the in-pipe cavities of a gun pipe are different in size, so that the fluid flowsthrough the inside of the pipe in a pulse mode, finally the fluid jetted from the jet nozzle of a cleaning gun is jetted in a pulse mode, the cavitation rate is effectively improved, and more cavitation nucleus are generated. A hollow rotation shaft of a cleaning disc is provided with a glow guide channel, a plurality of arc-shaped strips are arranged on the wall of the flow guide channel, the hollow rotation shaft jets the fluid downwards, and the fluid applies repulsion acting force on the cleaning disc, so that the cleaning disc is easily floated in water.

The invention provides an ultrasonic mechanical damage and thermal coagulation device and method based on double-frequency con-focal ultrasonic time-sharing excitation. High-low-frequency ultrasonic waves or low-high-frequency ultrasonic waves are sequentially transmitted by controlling a double-array-element annular con-focal power ultrasonic transducer in a time-sharing working mode or the ultrasonic transducer and phase-change micro-nano liquid drops are combined in use to achieve the purpose of improving ultrasonic mediated visco-elastic medium mechanical damage and thermal coagulation efficiency.

The invention discloses a method for preparing a latent fragrance perfume for cigarettes through dual-frequency ultrasonic. According to the method, different nitrogen sources and sugar sources are selected, and the primary stage of the Maillard reaction is carried out under the dual-frequency ultrasonic condition so as to obtain different intermediate products of the Maillard reaction to be served as the latent fragrance perfumes for being used in the cigarettes; the latent fragrance perfume can generate different fragrances along with the burning of the cigarettes, and has relatively obviously effect of improving the quality of the cigarettes. According to the method, the dual-frequency ultrasonic is served as the energy source for the Maillard reaction, thus the generation of disadvantage components can be avoided, the cavitation effect is improved, the low temperature is achieved along with high efficiency, and the time for preparing the latent fragrance perfume is greatly reduced; the volatile solvent is served as a reaction medium liquid, and therefore no solvent is residual in the reaction product, and the suction fragrance of the cigarette cannot be influenced; and the prepared latent fragrance perfume is high in yield, high in dissolubility in perfuming and charging solvent, enrichment in fragrance hierarchies and convenient to use, and is beneficial to storage of essence and perfume and stability of the quality of the cigarettes.

The invention discloses a metal electrodeposition device which comprises an electrodeposition tank and a power supply. An electroacoustic transducer system emitting ultrasonic waves parallel or perpendicular to the electric field direction to electrolyte during electrodeposition is arranged on the outer side of the electrodeposition tank, a magnetic pole N and a magnetic pole S for applying the magnetic field parallel or perpendicular to the electric field in the electrolyte during electrodeposition are arranged on the outer side of the electrodeposition tank and are distributed on two sides of the electrodeposition tank correspondingly. The intensity B of the magnetic field applied in the electrolyte by the magnetic pole N and the magnetic pole S ranges from 0.5 to 1.0T. A mixer used for mixing the electrolyte during electrodeposition and a heating system used for keeping the temperature of the electrolyte in the electrodeposition tank stable are arranged in the electrodeposition tank. In the process of metal electrodeposition of a cathode, the ultrasonic waves, the power and the magnetic field jointly act on the electrolyte by selecting the direction of the ultrasonic waves to coordinate and couple with the direction and the intensity of the power and the magnetic field, so that speed and density of electrodeposition are increased.

The invention discloses a multifunctional tea leaf cleaning machine which comprises a support, a water tank, a plurality of ultrasonic generators, a bubble generating pipeline, an air compressor, a slide bar, a lifting cylinder and at least one bucket. The water tank is mounted on the support, the ultrasonic generators are mounted in the water tank, a stirring roll is mounted in the water tank, a motor is connected to an end of the stirring roll, the air compressor is positioned below the water tank, the bubble generating pipeline is mounted in the water tank, the air compressor is connected with the bubble generating pipeline by an air delivery pipe, a cleanser storage tank is mounted on the support and is connected with the water tank by a liquid delivery pump, the slide bar is mounted on the support and is positioned above the water tank, a slider is mounted on the slide bar, a slide motor and the lifting cylinder are mounted on the slider, and the buckets are connected onto the lifting cylinder. The multifunctional tea leaf cleaning machine has the advantages that cleaning effects can be effectively improved, pesticides and other pollutants on the surfaces of tea leaves can be effectively removed, the tea leaves can be automatically discharged after being completely cleaned, and accordingly the cleaning efficiency can be improved.

The invention relates to an integrated rotary cavitating jet nozzle comprising a cylindrical inlet segment, a cylindrical resonant cavity, a cylindrical pore and a cylindrical outlet segment. The cylindrical outlet segment is provided with a plurality of intake tubes; bores of the intake tubes are tangent to a bore of the cylindrical outlet segment. The inner diameter of the intake tubes is half a difference between the inner diameter of the cylindrical outlet segment and the diameter of the cylindrical pore. The section of the bore of each intake tube is round, square, or in any special shape. The intake tubes can be axially distributed in multiple rows at the cylindrical outlet segment of a nozzle body. Compressed air is led into the intake tubes, the compressed air led in from the intake tubes enters in the tangent direction, air swirls surrounding a water jet are formed in the cylindrical outlet segment and drive the water jet to turn into a rotating vortex in the cylindrical outlet segment, and cavitating effect is further enhanced; meanwhile, cavitating bubbles are concentrated to the center of the water jet, energy of the cavitating water jet is more concentrated, the shear action of the jet upon a target is enhanced, and eroding capacity of the cavitating jet is greatly improved accordingly.

The invention relates to a tandem type hydrodynamic force sound wave generation device. The tandem type hydrodynamic force sound wave generation device is characterized in that the front end of a cavity is provided with a first spray nozzle connected with a fluid pipeline, the back end of the cavity is provided with a second spray nozzle, the center lines of the first nozzle and the second nozzle are on the same straight line, and a divergent reflector is arranged on the outer wall of the second spray nozzle; the first spray nozzle and the second spray nozzle are connected in series through an oval cavity, two spring pieces can be used for generating different sound wave frequencies, and sound waves generated by the second spring piece are reflected by the inner wall of a reflector and then propagate along the divergent reflector, so that the generated sound waves have directivity. In addition, the tandem type hydrodynamic force sound wave generation device has the advantages of strong cavitation effect, high fluid mixing and emulsifying efficiency, simple structure, stable operation and relatively low cost; and as the movable spray nozzles can be changed and adjusted according to practical requirements, the tandem type hydrodynamic force sound wave generation device is suitable for industrialized application.

The invention provides a preparation method of natural plant dye. The method comprises the first step of cleaning, the second step of mixing, the third step of ultrasonic extraction, the fourth step of distillation and the fifth step of filtration. According to the preparation method of the natural plant dye, by means of multi-frequency ultrasonic extraction operation, the mechanical effect, the cavitation effect and the thermal effect of the dye can be greatly enhanced; compared with single-frequency acoustic extraction, the extraction time can be shortened by 40% to 60%, the extraction temperature can be declined by 15 DEG C to 20 DEG C, damage to natural pigments and effective components caused by the temperature is reduced, therefore, the extraction rate is increased, and the quality is improved; due to the fact that optimum induction frequencies of different plant cells are different, according to the preparation method of the natural plant dye, different frequencies can be appropriately adjusted and combined, coextraction of various plants with similar hues can be achieved, the energy sources are saved, and the efficiency is improved. The prepared plant dye is stronger in adhesion effect and pure and elegant in color, the antibacterial and anti-virus effects are achieved, and the plane dye is safe, harmless, natural and environmentally friendly.

The invention provides a micro-nano bubble generating device and method and application thereof in dye wastewater treatment. The micro-nano bubble generating device provided by the invention comprisesa pressure dissolved gas tank, a gas and liquid mixing pump, a jet ejector and a water box. By adjusting the gas suction volume of the gas and liquid mixing pump and the jet ejector, the device provided by the invention can generate a large number of micro-nano bubbles with a slow rising speed and a diameter between 100nm and 300nm. Aiming at the problems of deep chroma, high COD content and difficult degradation of dye wastewater, the high-efficiency oxygenation and hydroxyl radical-producing properties of the micro-nano bubbles can non-selectively degrade organic matters in water, and the foam generated in the degradation process can be relieved by finely adjusting temperature, salt concentration, defoamer concentration and the like. The micro-nano bubble generating device and method provided by the invention have very high application value in dye wastewater treatment.

The invention relates to a method for processing porous starch through dual-frequency ultrasonic assisted acid hydrolysis, belonging to the field of modified starch processing. The method comprises the steps of: by taking starch (such as corn starch, sweet potato starch, mung bean starch, chickpeas starch and pea starch) as raw materials, preparing starch milk by using a hydrochloric acid solution with a certain concentration, putting the starch milk in a dual-frequency ultrasonic reactor for ultrasonic processing, stirring continuously, stopping ultrasonic after reaction for a certain time, adjusting the pH value to be neutral by using a saturated sodium carbonate solution, repeatedly centrifugal washing, drying, and grinding to obtain a porous starch product. The porous starch provided by the invention has deep and dense pores with uniform pore size, the pore volume accounts for above 70% of the particle volume, and the porous starch is strong in adsorbability, short in production cycle and low in processing cost, and can be widely applied in the fields of foods, medicine and health care, agriculture, paper making, printing, cosmetics, detergents and the like.

The invention relates to a focusing ultrasonic cavitation treatment instrument which is used for treating tumor, thrombolysis, ischemic myocardium and disease of prostate based on the cavitation effect of the ultrasonic contrast agent microvesicle. The focusing ultrasonic cavitation treatment instrument comprises a main control machine, two combined treatment probes, and a B ultrasonic machine with an ultrasonic focusing ultrasonic cavitation treatment instrument function. The focusing ultrasonic cavitation treatment instrument is mainly used for the partial area of the focus, and carries out non-invasive treatment on the tumor based on the cavitation effect of the microvesicle. The microvesicle can greatly improve the cavitation effect, so that the ultrasonic focusing positioning radiation with low power can be precisely carried out in the partial area of the focus, and the cavitation effect of the microvesicle within the vessel just can be activated within the partial area, and the capillaries in the tumor can be subject to embolism and damage, so as to achieve the purpose of 'starving' the tumor. The threshold for generating the cavitation is not met by the ultrasonic energy at the periphery of the focusing area, so that the cavitation effect is not generated, so that the path where the ultrasonic wave passes or the ambient tissue can not be damaged; and the functions of the common tissue and organs are protected.

The invention discloses an ultrasonic root system cleaning machine and a working method thereof. The ultrasonic root system cleaning machine comprises a machine body. A top cover plate is fixedly connected to the upper portion of the machine body, and a cleaning basket is connected to the lower portion of the top cover plate. A cleaning chamber is arranged in the machine body, and comprises a main cleaning chamber. A soil settling chamber is arranged below the main cleaning chamber, and a deposition chamber is arranged below the soil settling chamber. A mud discharger is arranged in the deposition chamber and connected with a driving mechanism, and the driving mechanism is connected with an integrated controller. A dirt discharge hole is formed under the position, stretching out of the machine body, of the deposition chamber. An ultrasonic generator I and an ultrasonic generator II are oppositely installed on the inner sides of the machine body respectively and connected with the integrated controller, and the integrated controller is used for adjusting the frequency and power of the ultrasonic generator I and the ultrasonic generator II. The problems of power and frequency adjustment, machine bottom sludge discharge and root system damage are effectively solved, and the working efficiency of the cleaning machine is improved.

The invention relates to a method for preparing apple polyphenol, which solves the problem that the prior method for preparing apple polyphenol is low in extraction efficiency, not high in purity and complex in production process. The method for preparing apple polyphenol comprises the technical steps of selecting apples, quickly slicing, rinsing and scalding the apples, removing enzyme, drying and grinding the obtained product, performing auxiliary ultrasonic extraction through grinding beads, using a centrifuge to separate extract liquid, using a rotary evaporator for concentration, performing purification and concentration through a chromatographic column and freeze-drying the obtained product through a vacuum freeze-drying machine to obtain apple polyphenol freeze-dried powder. The apple polyphenol prepared by the method is natural extract, is free from side effects on human bodies, and has the function of strengthening immunity, resisting tumor, reducing blood fat, lowering blood pressure, resisting blood coagulation and thrombosis, reducing weight, beautifying and protecting skin, and the like. The method can be applied to the fields of food, health-care products, cosmetics, medicine, biochemical engineering and the like.

The invention relates to an ultrasonic cavitation intensifying device and an ultrasonic cavitation intensifying method. The ultrasonic cavitation intensifying device comprises an energy converter and a gas nucleus source. The energy converter is used for converting electric energy into ultrasonic waves, the ultrasonic waves enter liquid through the radiant surface of the energy converter, and then a sound field is formed in the liquid. The gas nucleus source is used for providing gas nuclei for the liquid, cavitation bubbles are formed in the liquid by the gas nuclei generated by the gas nucleus source and the gas nuclei originally existing in the liquid under the action of the sound field, and cavitation cloud is formed through cavitation bubble gathering. According to the ultrasonic cavitation intensifying device, the gas nucleus source can be placed in an ultrasonic field near the radiant surface of the energy converter, a large number of gas nuclei are continuously generated, the cavitation bubbles are formed by the gas nuclei under the action of the sound field, the cavitation cloud is generated, and therefore the cavitation effect is enhanced.

The invention discloses a floating type suction and cavitation combined ozone water treatment device and belongs to the field of sewage treatment. The floating type suction and cavitation combined ozone water treatment device comprises a calibration gauge, a water taking pipe, a flap valve, an ozone generation device, a gas flow meter, a liquid stop valve, an ozone introduction pipe, a suction and cavitation combined ozone reaction region, a water pump, a liquid flow meter, a water outlet pipe, a shower nozzle, an outlet water remaining box and a carrier, wherein the suction and cavitation combined ozone reaction region comprises a cavitation generator, an equal-diameter cavitation section and an observation chamber. According to the floating type suction and cavitation combined ozone water treatment device disclosed by the invention, algae water with different depths in different water regions can be treated, so that sewage is mixed with ozone after the sewage generates a hydraulic cavitation effect; and the efficiency of sewage treatment is greatly improved, and the utilization rate of the ozone is greatly increased.

The invention relates to an abalone flesh cleaning apparatus. The abalone flesh cleaning apparatus comprises a frame, the frame is provided with a roller group for conveying abalone flesh, a plurality of first high-pressure nozzles for cleaning the abalone flesh are arranged above the roller group, the end of the roller group is provided with a motor drive mechanism for driving the roller group to rotate, both sides of the roller group are provided with blocking plates for preventing the abalone fresh from falling, the input end of the roller group is arranged under the output end of a roller cleaning machine for the oscillating cleaning of the abalone fresh, and the output end of the roller group is provided with a receiving tank for receiving the abalone fresh. The abalone flesh cleaning apparatus uses ultrasonic coupling ozone water for cleaning abalone mucus and is high in cleaning efficiency, capable of avoiding cross-contamination and high in operability.

The invention discloses a multilayer nested cavitator capable of forming large-range cavitation. The multilayer nested cavitator mainly comprises an inlet section used as a flow distribution cavity, and through which a fluid enters the spaces of the various layers of the nested cavitator respectively, a nested tube section composed of two or more coaxial Venturi cavitators, and used for creating necessary pressure conditions for generation of liquid cavitation, an outlet section through which liquids from the various layers of cavitators are collected and flow out of the cavitators. The multilayer nested cavitator disclosed by the invention is capable of effectively expanding the action range of cavitation. A numerical simulation result indicates that compared with a single Venturi cavitator, the average gas holdup is increased by more than 5%, and the total volume of a gas in a cavitation area is increased by more than 16% under the same flow and pressure difference condition.

The invention discloses an easily-operated type recoilless underwater cavitation cleaning spray gun which is composed of a gun handle, a spray beam, a cavitation spray nozzle, a back spray nozzle, an unloading protection tube and other accessories. The gun handle, the cavitation spray nozzle and the back spray nozzle are connected with the spray beam through threads, and a quick-change connector is mounted at the lower end of the gun handle and can be used for being connected with a high-pressure hose. The cavitation spray nozzle and the back spray nozzle with water flow spraying directions opposite to each other are mounted on the same axis, so that recoil of the spray gun can be eliminated. Light floating body materials in the accessories can provide buoyancy force for the spray gun to enable the spray gun to be in a state of zero buoyancy force; through a positioning jig, the spray gun is enabled to be at the best cleaning angle when used underwater; the unloading protection tube provided with strip-shaped holes is mounted on the outer portion of the back spray nozzle, a function of unloading is achieved, and safety of operating personnel can be protected.

The proposed multifunctional hydrodynamic vortex type reactor includes—a housing having curvilinear inner sidewalls,—a base attached to the housing, an inverse taper narrowing downward and attached to the top of housing,—a supporting tube passing at least through the housing and base,—a set of washers tapered downward and mounted on an outer surface of the supporting tube such that outer upper edges of the set of washers and the inner sidewalls form predetermined gaps therebetween, and—a number of inlets tangentially attached to the base for introducing, under external pressure, a solid substance and a liquid (or a suspension of their mixture) thereinto, forming a circulating flow therein. The flow forms a high speed bypassing cavitation zone and, changing its direction at the inverse taper, forms a vortex cavitation zone, providing for mixing and grinding the substance up to nanoscale sizes. Methods for intensifying cavitation are also provided.

The invention discloses a microbubble synergistic dynamic experiment system based on a double frequency superimposed ultrasonic pulse in a viscoelastic medium and a microbubble synergistic dynamic experiment method based on the double frequency superimposed ultrasonic pulse in the viscoelastic medium. The experiment method comprises the following steps 1) according to an actual waveform of a focal region sound field measured by a hydrophone, setting KZK equation parameters and establishing a microbubble nonlinear excitation waveform; 2) constructing a HIFU synergistic model according to viscoelasticity of a biological tissue and vibration characteristics of the microbubble in compressible fluid; 3) establishing a microbubble synergistic dynamic method based on double frequency superimposition; 4) in combination with simulation results of steps above, determining a HIFU waveform phase, sound pressure and frequency parameters to perform a thermal ablation or tissue damage experiment. According to the system and the method provided by the invention, the dynamic characteristics of the microbubble in the biological tissue are used fully to design the sound wave waveform and the phase parameter, maximum vibration of the microbubble is triggered at a focal region, a cavitation effect is enhanced, and safety and efficiency of HIFU thermal ablation and tissue damage are improved.

The invention relates to an ultrasonic cavitation intensifying device and an ultrasonic cavitation intensifying method. The ultrasonic cavitation intensifying device comprises an energy converter and a gas nucleus source. The energy converter is used for converting electric energy into ultrasonic waves, the ultrasonic waves enter liquid through the radiant surface of the energy converter, and then a sound field is formed in the liquid. The gas nucleus source is used for providing gas nuclei for the liquid, cavitation bubbles are formed in the liquid by the gas nuclei generated by the gas nucleus source and the gas nuclei originally existing in the liquid under the action of the sound field, and cavitation cloud is formed through cavitation bubble gathering. According to the ultrasonic cavitation intensifying device, the gas nucleus source can be placed in an ultrasonic field near the radiant surface of the energy converter, a large number of gas nuclei are continuously generated, the cavitation bubbles are formed by the gas nuclei under the action of the sound field, the cavitation cloud is generated, and therefore the cavitation effect is enhanced.

The invention relates to the technical field of medical ultrasonics, and discloses an ultrasonic transducer and a preparation method thereof. The ultrasonic transducer comprises a housing; a piezoelectric layer is arranged in the housing, and comprises at least two piezoelectric array elements; the frequency space between the two piezoelectric array elements is 50 kHz to 1.2 MHz; and an acoustic lens is arranged at the front end of the piezoelectric layer, and is used for ensuring that the piezoelectric array elements at different frequencies are confocal. The ultrasonic transducer can receiveexcitation signals of two or more frequency components, on the premise of not increasing the power loss, the ultrasonic cavitation effect is enhanced, and the ultrasonic transducer adopting the structure is convenient to prepare and low in cost. The treatment effect can be enhanced, the feasibility is high, and a good treatment effect can be obtained when the ultrasonic transducer is applied to blood brain barrier opening, ultrasonic thrombolysis, ablation treatment, nerve regulation and the like.

The invention discloses a multi-resonance-cavity cavitating jet nozzle which comprises a left end body, a right end body and at least one middle body, wherein the tail end of the left end body is in threaded connection with the first middle body, and the right end body is in threaded connection with the last middle body, thus forming at least three resonance cavities with identical structures; inlets and outlets of the resonance cavities are connected with different stages of necking openings; the tail resonance cavity and a spraying opening are formed in the right end body; the axial lines of the multiple resonance cavities, the different stages of necking openings and the spraying opening are overlapped with the axial line of the nozzle; and a first sine flow guide curved surface and a second sine flow guide curved surface are arranged at the front part of the left end body, so that liquid can quickly and stably enter the nozzle, is severely cavitated through the multiple stages of necking openings and the multiple resonance cavities, and is finally sprayed out from the spraying opening. Compared with the prior art, the multi-resonance-cavity cavitating jet nozzle disclosed by the invention can conform to influx of high-flow high-flowing speed liquid; and the sine flow guide curved surfaces, the multiple resonance cavities and the multiple stages of necking openings enhance the cavitating effect on the liquid and improves the cavitating efficiency.

The invention discloses an underwater crack corrosion jet nozzle. A jet flow inlet is formed in the upper portion in a valve, a conical oscillation cavity from small to large is formed in the middle in the valve, a self-oscillation cavity communicated with the oscillation cavity is formed in the lower portion in the valve, and the center of the jet flow inlet, the center of the oscillation cavity and the center of the self-oscillation cavity are all located on the same axis. A left feedback channel is formed in the left side of the valve, one end of the left feedback channel is communicated with the end of the jet flow inlet, and the other end of the left feedback channel is communicated with a left backflow cavity in the bottom of the oscillation cavity. A right feedback channel is formed in the right side of the valve, one end of the right feedback channel is communicated with the end of the jet flow inlet, and the other end of the right feedback channel is communicated with a right backflow cavity in the bottom of the oscillation cavity. A left capillary air hole communicated with the left feedback channel is formed in the left side of the valve, and a right capillary air hole communicated with the right feedback channel is formed in the right side of the valve. Two or more cavitation forms are combined, so that resonance is carried out in the valve to generate more bubbles, the capacity for the jet nozzle to generate cavitation is enhanced, and the washout effect of cavitation jet flow on a target is enhanced. The underwater crack corrosion jet nozzle can be used for cleaning the bottom of ship or an offshore production platform support.